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 /*
  * =============================================================================
  * 
  *   Copyright (c) 2007, The JASYPT team (http://www.jasypt.org)
  * 
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
  *   You may obtain a copy of the License at
  * 
 *       http://www.apache.org/licenses/LICENSE-2.0
 * 
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 * 
 * =============================================================================
 */
package org.jasypt.salt;

This implementation of SaltGenerator always returns a fixed salt set by the user.

If the requested salt has a size in bytes smaller than the specified salt, the first n bytes are returned. If it is larger, an exception is thrown.

This class is thread-safe.

Author(s):
Daniel Fernández Garrido
Since:
1.2
public final class FixedByteArraySaltGenerator implements SaltGenerator {
    private byte[] salt = null;
    
    
Creates a new instance of FixedByteArraySaltGenerator
    public FixedByteArraySaltGenerator() {
        super();
    }

    
    
Sets the salt to be returned.

Parameters:
salt the specified salt.
    public synchronized void setSalt(byte[] salt) {
        Validate.notNull(salt"Salt cannot be set null");
        this. = salt;
    }

    
    
Return salt with the specified byte length.

Parameters:
lengthBytes length in bytes.
Returns:
the generated salt.
    public byte[] generateSalt(int lengthBytes) {
        if (this. == null) {
            throw new EncryptionInitializationException(
                    "Salt has not been set");
        }
        if (this..length < lengthBytes) {
            throw new EncryptionInitializationException(
                    "Requested salt larger than set");
        }
        return ArrayUtils.subarray(this., 0, lengthBytes);
    }


    
As this salt generator provides a fixed salt, its inclusion unencrypted in encryption results is not necessary, and in fact not desirable (so that it remains hidden).

Returns:
false
    public boolean includePlainSaltInEncryptionResults() {
        return false;
    }
    
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